Covering all recent advancements in the field, discusses fundamentals and applications in tunable evanescent-mode filters with concepts supported by hardware demonstrations to help the reader design experiments, a variety of detailed illustrations to aid in reader comprehension, and worked-out examples to help connect theory to practice. The book is divided into three parts. The first part introduces associated physics, providing background information on topics such as filter anatomy, coupling matrix and routing diagrams, evanescent-mode resonators, and more. The second part covers implementation, describing topics like printed circuit boards, silicon microfabrication, and injection molding. The last part covers applications and discusses a broad range of topics including absorptive bandstop filters, bandwidth and passband control, high-order and fractional-order evanescent-mode filters, advanced evanescent-mode filter structures, and phase-locked loop and balanced-balanced tunable filtering. Written by two highly qualified academics with significant research experience in the field, also explores topics such as: is a one-of-a-kind and completely up-to-date reference on the subject for both beginners in tunable RF systems looking for learning the fundamentals, as well as advanced researchers who are interested in the most effective techniques and latest developments in the field.